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The Windows Live APIs now expose a standard authentication technology that lets your Web application access Windows Live user data easily, yet keeps control in the hands of users.

United States Postal Service (USPS) Web Tools Wrapper is a .NET library you can use for address validation, retrieving rates and YES even printing label.

Recently, I had to write a website that processes credit card transactions, and I was shocked to find that Authorize, one of the larger payment gateways, did not provide any sort of .NET API. They support HTTP Posting of a string that defines the transaction, and they send back a string that describes the result. So, I wrote a wrapper class for use in our website, and decided to offer it here for anyone else that may need it..

Do you have a cool personalized application that you want to offer to over 400 million users? Do you want to light it up with Live controls or create a mashup with Live resources?Windows Live ID now offers a simple way for third parties to get Live ID authentication in your Web or rich client applications, letting you reach millions of Live ID users, integrate with Live Controls, and access Live services.

Have you ever wanted to implement search capabilities on your own Web site but didn't want to implement the logic and deal with issues such as storage and indexing?The Live Search team now offers two different ways to utilize Search on your site: using the Live Search Box or using the Windows Live Search API.

Web Service Software Factory: Modeling Edition is a collection of resources for modeling and building Web services for Windows Communication Foundation and ASMX.

A C# Library Interface For the Digg.com API

The Caching Application Block's provider mechanism lets you create a custom provider that stores cached data anywhere you want. It was this that made me wonder if it was possible to cache data within or through a web service, which would allow the provider to cache its data almost anywhere—remotely or locally—without having to write specific code that is directly integrated within Enterprise Library.

The principle is simple enough. Instead of having the backing store provider within the Caching Application Block interact directly with the backing store (the usual approach, as implemented in the Isolated Storage provider and Database provider), the backing store provider simply packages up the data and sends it to a web service..

In this article we want to add a simple extension to the project seen in the CodeProject article "A GPS tracer application for Windows Mobile CE 5". We want to create a Web Service which can be invoked by the mobile application to store, on a remote SQL2005 Data Base, the path followed by different GPS devices. The easiest and fastest way to achieve this result is represented by the Web Service Software Factory (next WSSF for short). This strategy is, at the same time, the best way to build higher quality service using well known pattern and practices...

The Web Service Software Factory is designed to provide guidance and enhanced tools for building Web services using ASMX or WCF.